package com.itheima.patterns.builderpattern.builder.demo1;

public abstract class Builder {
    //声明Bike类型的变量，并进行赋值
    protected Bike bike = new Bike();
    
    public abstract void buildFrame();
    
    public abstract void buildSeat();
    
    //构建自行车的方法
    public abstract Bike createBike();
}